273 overheating after new timing chain set and waterpump

Heating / Cooling / AC

  1. toolmanmike

    toolmanmike Moderator Staff Member FABO Gold Member

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    I deleted the other one. I can usually merge them but couldn't find this one until after the delete. Duplicate threads can be darned confusing for the members and can be a pain in the azz for the moderators.
     
  2. K.O. SWINGER

    K.O. SWINGER Meeting in the alley since 1976

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    I would start by pulling the thermostat, is it possible that you put it in upside down? It has done been done many times before don't ask me how I know that. by pulling the thermostat you eliminate it from the equation also you should be able to see a steady flow of water through the top of the radiator
     
    • Agree Agree x 1
    • Wally-T

      Wally-T 64 Signet

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      Thank you Moparmat. You read the whole post and obviously it soaked in. LOL
      It's a 1964 convertible.
      After checking RockAuto for water pumps I noticed that all of the pics of 273 and 318 water pumps only show steel impellers with 8 blades. I'm pretty sure the new one I put in has the 8 blade not 6, but I can't be sure without removing it. My old plastic one has 10, I counted them today. Also, the new pump had three small outlet holes where my old one had two so I had to plug one. One is for the heater hose and one for the bypass, not sure what the third would be for, maybe the other heater hose in some applications. By the way guys, I didn't do this job because it was overheating, it needed a timing chain set and my boss talked me into changing the water pump too.
      For some of the other questions asked.
      No it hasn't boiled over, I won't let it get that far.
      I don't know the temp, the gauge just has "C" and "H" and a couple of lines in between.
      And no , I wasn't talking about a 60 degree day last fall, I'm not dumb.
      The rad was checked and a new cap installed.
      Timing chain was a typical and easy install.
      Thanks again guys. Wally
       
      Last edited: Jul 7, 2020
    • moparmat2000

      moparmat2000 FABO Gold Member FABO Gold Member

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      Here ya go lol

      attachment-73.jpg
       
    • toolmanmike

      toolmanmike Moderator Staff Member FABO Gold Member

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      Like I ask on every ''getting hot" or "overheating" thread, is it actually boiling coolant out of the overflow? If not, it's not overheating.
       
    • pishta

      pishta I know I'm right....

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      This is supposed to be an A/C NOS water pump. PN 3004763 I think the later '30' number denotes a later design year.
      1965 parts manual shows a 10 blade plastic impeller but also shows 2 part numbers, A/C and non A/C for the 273
      s-l1600.jpg

      1964 Thru 1967 273 CI

      1967-9 318 CI with A/C

      1969 340 CI with A/C
       
    • Wally-T

      Wally-T 64 Signet

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      Yesser. Half way between "Keep an eye on it " and "Find a place to pull over" is where it was so I revved er up and it slowly dropped back down.
       
    • Wally-T

      Wally-T 64 Signet

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      I disagree, it's getting too hot...overheating. Boiling over is overheating to the max. We could agree to disagree though. :)
       
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      • toolmanmike

        toolmanmike Moderator Staff Member FABO Gold Member

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        Normal operating temp on a factory gauge. Something is wrong if it runs less than half like you mentioned in your first post.
         
      • toolmanmike

        toolmanmike Moderator Staff Member FABO Gold Member

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        Until you put a real gauge on it you will never know for sure. A digital non contact thermometer will get you pretty close.
         
      • Wally-T

        Wally-T 64 Signet

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        So there is a 6 blade! Well mine did have a ten blade, as I said, I counted them today (glad it didn't have 11, I would have run out of fingers and thumbs ha ha). So I wonder why they put a 10 blade on a tiny 273? I'm thinking I should try to have my old one rebuilt if I can't find another 10 blade at a reasonable price. Now I know what some people mean when they say these old beasts can be money pits. Wow.
        Thanks Pishta
         
      • 4spdragtop

        4spdragtop CONGRATS NORTH AMERICA! FABO Gold Member

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        Dont trade your pump in as a core. Hang onto it. I bought a new pump for our 67 cuda 273 and the machined bosses for pwr steering pump and alternator were off. I kept my original and have since found an NOS one.
        Your old one may come in handy for measuring etc. Rebuild kit?
         
      • Wally-T

        Wally-T 64 Signet

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        I'm trying to find a rebuild kit but no luck yet. And I get what you're saying, I really don't want to let the old one out of my sight. The new one was an actual new one not a rebuild so I was able to keep my old one. Thanks for your post, Wally
         
      • pishta

        pishta I know I'm right....

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      • Wally-T

        Wally-T 64 Signet

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